Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2011-07-25
J. Phys. A: Math. Theor., 45(1): 015203, 2012
Physics
Condensed Matter
Soft Condensed Matter
25 pages, 6 figures
Scientific paper
10.1088/1751-8113/45/1/015203
The stability of the fundamental defects of an unstretchable flat sheet is examined. This involves expanding the bending energy to second order in deformations about the defect. The modes of deformation occur as eigenstates of a fourth-order linear differential operator. Unstretchability places a global linear constraint on these modes. Conical defects with a surplus angle exhibit an infinite number of states. If this angle is below a critical value, these states possess an n-fold symmetry labeled by an integer, n \geq 2. A nonlinear stability analysis shows that the 2-fold ground state is stable, whereas excited states possess 2(n - 2) unstable modes which come in even and odd pairs.
Guven Jemal
Mueller Martin Michael
Vázquez-Montejo Pablo
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